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Specifications
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"SIGNAL" SURVEY METER, MODEL 4022

Rugged Enclosure

Self Checking Battery
QR Quick Response Meter

Illuminated Meter

The SIGNAL is a high quality general purpose survey meter that can be used to monitor radiation levels for occupational exposures. It is a small, light, handy instrument that can slip into a lab coat pocket.

The sophisticated circuitry inside the SIGNAL is protected by a durable black anodized aluminum case. The measurement range is from 1 to 1000 mR/h. The beeper is controlled by the power switch and the light is illuminated by a push-button.

When the instrument is first turned on it automatically displays the battery level and beeps if the battery is good. The battery life is 500 hours or about a year under normal use.

The QR or quick response meter eliminates the need for an adjustable time constant. This circuit adjusts the time constant dynamically. When the counting rate increases, the meter will quickly move up scale then slow down as it approaches the true value. The same action happens if the counting rate decreases; the meter will go down scale quickly then as it nears the true value it will slow down. This feature reduces the statistical meter fluctuations at low levels while still responding quickly to significant changes in the reading.

Anywhere there are occupational exposures there is a need for the SIGNAL.


Specifications


Mechanical
Dimensions: 3" x 6.3" x 1.9" (7.6 x 16 x 4.8 cm)
Weight: 14 oz .(.4 Kg)
Case: Black anodized aluminum
Detector: Energy Corrected GM tube

Operational
Readout: 2 1/4" Taut Band Meter
Range: 0-10, 0-100, 0-1000 mR/h
Radiation Detected: Gamma or high energy Xrays
Battery: 9 Volt, 500 hour life
Battery Indication: At turn on the beeper will beep if the battery is good. The meter will also automatically show the battery level.
External Controls: Range x 1, 10 , 100; Power on, off, on with beeper; meter light push-button
Internal Controls: Calibration control for each range, x1, x10, x100
"QR" Time Constant: X1: 7 sec slow, 1 sec fast; X10: 3.2 sec slow, 1 sec fast; X100: 1 sec
Beeper: Piezo type. Beeps with every count from the detector. Can be turned off with the power switch.

   
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Specifications subject to change without notice.
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